Description

The AS1431 is a three-terminal adjustable shunt regulator providing a highly accurate 0.4% bandgap reference. The adjustable shunt regulator is ideal for a wide variety of linear applications that can be implemented using external components to obtain adjustable currents and voltages. In the standard shunt configuration, the combination of low temperature coefficient (TC), sharp turn-on characteristics, low output impedance and programmable output voltage make this precision reference a perfect zener diode replacement. The AS1431 is characterized to operate over the full automotive temperature range of -55 to 125°C and is now available in the SOT-23 (5L) package.

Specifications and features

• Temperature-compensated: 30 ppm/°C
• Trimmed 0.4% bandgap reference
• Internal amplifier with 150 mA capability
• Temperature range: Extended to -55 to 125°C
• Low frequency dynamic output impedance: < 150 mΩ
• Low output noise
• Robust ESD protection

Application Scenarios

The AS1431 is suitable for a wide range of applications in electronics and electrical systems. It can be used in various linear applications that require adjustable currents and voltages. Its low temperature coefficient, sharp turn-on characteristics, low output impedance, and programmable output voltage make it an ideal replacement for zener diodes. It operates reliably over the full automotive temperature range, making it suitable for automotive applications.

Comparison

- Highly accurate 0.4% bandgap reference
- Adjustable currents and voltages
- Low temperature coefficient
- Sharp turn-on characteristics
- Low output impedance
- Programmable output voltage
- Suitable for automotive applications

- None identified